A Pool Player Is Attempting a Fancy Shot

question 11

Multiple Choice

A pool player is attempting a fancy shot.He hits the cue ball giving it a speed of 5.57 m/s and directs its center on a path tangent to the surface of the target ball having the same mass as the cue ball.After the collision (on a frictionless table) the initially-stationary ball moves with a speed of 4.82 m/s.After the collision,the new speed of the cue ball and the relative direction of the balls are closest to

• A) 2.79 m/s, at 90° to each other.
• B) 2.79 m/s, at 60° to each other.
• C) 8.34 m/s, at 90° to each other.
• D) 8.34 m/s, at 60° to each other.

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Definitions:

Basalt

A fine-grained, dark-colored mafic igneous rock, with or without vesicles and phenocrysts of pyroxene, olivine, or feldspar.

Dark Lava Rock

Often basalt, this is a type of volcanic rock that is rich in iron and magnesium, giving it a dark coloration.

Continental Crust

The thick part of the Earth's crust that forms the continents and continental shelves, consisting mainly of granitic rocks.

Oceanic Crust

The thin, dense layer of the Earth's crust that underlies the ocean basins, composed primarily of basaltic rock.